Patents by Inventor Sylvain Perrin

Sylvain Perrin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the production of 2,2,6-trimethylcyclohexane-1, 4-dione
    Publication number: 20020165414
    Abstract: Process for the production of 2,2,6-trimethylcyclohexane-1,4-dione by epoxidation of &bgr;-isophorone with organic percarboxylic acids at a water content below 5 wt.-% and subsequent isomerization of the mixture of &bgr;-isophorone epoxide and hydroxyisophorone.
    Type: Application
    Filed: February 28, 2002
    Publication date: November 7, 2002
    Inventors: Steffen Krill, Klaus Huthmacher, Sylvain Perrin
  • Process for the production of an intermediate mixture of &bgr;-isophorone epoxide and its isomer 4-hydroxyisophorone (HIP)
    Patent number: 6469215
    Abstract: A process for the production of an intermediate mixture of &bgr;-isophorone epoxide and its isomer 4-hydroxyisophorone (HIP), comprising reacting &bgr;-isophorone with an organic percarboxylic acid, in the form of its non-aqueous solution, in an inert solvent.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: October 22, 2002
    Assignee: Degussa AG
    Inventors: Steffen Krill, Klaus Huthmacher, Sylvain Perrin
  • Process for the production of 2,2,6-trimethylcyclohexane-1,4-dione
    Patent number: 6420609
    Abstract: Process for the production of 2,2,6-trimethylcyclohexane-1,4-dione by epoxidation of &bgr;-isophorone with organic percarboxylic acids at a water content below 5 wt.-% and subsequent isomerization of the mixture of &bgr;-isophorone epoxide and hydroxyisophorone.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: July 16, 2002
    Assignee: Degussa AG
    Inventors: Steffen Krill, Klaus Huthmacher, Sylvain Perrin
  • Process for the production of 2,2,6-trimethylcyclohexane-1,4-dione
    Publication number: 20020010305
    Abstract: Process for the production of 2,2,6-trimethylcyclohexane-1,4-dione by epoxidation of &bgr;-isophorone with organic percarboxylic acids at a water content below 5 wt.-% and subsequent isomerization of the mixture of &bgr;-isophorone epoxide and hydroxyisophorone.
    Type: Application
    Filed: May 8, 2001
    Publication date: January 24, 2002
    Inventors: Steffen Krill, Klaus Huthmacher, Sylvain Perrin